全息凹面光栅光谱仪信号复原技术研究  

Spectral recovery of holographic concave grating spectrometer

作　　者：祁书麟 Qi Shulin(Automation College,Nanjing University of Posts and Telecommunications,Nanjing 210000,China)

机构地区：[1]南京邮电大学自动化学院,南京210000

出　　处：《分析仪器》2020年第2期110-114,共5页Analytical Instrumentation

摘　　要：全息凹面光栅光谱仪的成像系统存在较大慧差,传统光谱信号复原技术中被经常用来近似冲击响应的高斯型点扩散函数不再适用。提出了一种改进的点扩散函数模型可以有效的近似全息凹面光栅光谱仪的冲击响应,利用低压汞灯作为输入光源,测量全息凹面光栅光谱仪的点扩散函数,拟合出冲击响应的近似解,通过基于泊松随机场的反卷积算法对光谱信号复原。实验结果表明了改进模型相对于高斯模型的优越性。An improved point spread function model is proposed to approximate the impulse response of a holographic concave grating spectrometer.Using low-pressure mercury lamp as the input source,the point spread function of the holographic concave grating spectrometer is measured,and the approximate solution of the impact response is obtained.The spectral signal is recovered by deconvolution algorithm,which is based on a Poisson random field.The experimental results show the improved model is superior to the Gaussian model.

关 键 词：光谱仪 全息凹面光栅 信号复原 点扩散函数 

分 类 号：TH744.1[机械工程—光学工程]